Skate-runner grinder.



'0. L. JOY. SKATE RUNNER GRINDER. APPLICATION FILED APR. 7, 1908.

Patented Nov. 23', 1909.

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3 3 momma I g: wig ewfoa G. L. JOY.

SKATE RUNNER GRINDER.

APPLICATION nun APR. 1, 1908.

940,931. 7 V Patented Nov. 23, 1909.

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CHARLES L. JOY, OF NEW HAVEN, CONNECTICUT.

SKATE-RUNNER GRINDER.

' Specification of Letters Patent.

Application filed April 7, 1808. Serial No. 425,608.

To all whom it may concern: I

Be it known that I, CHARLES L. JoY, a citizen of the United States, and a resident of New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Skate- Runner Grinders, of which the following is a specification.

My invention relates to an improvement in skate runner grinders, being an improvement on the patent granted to me November 13, 1906, No. 835,535.

To enable others to understand my invention, reference is had to the accompanying drawings, in which:

Figure 1 is an upper plan view of the traveling carriage, skate runner holder, broken view of the bed and grinding wheel arbor; Fig. 2 is an end elevation of the ma chine looking in the direction of arrow a of Fig. 1; and Figs. 3, 4 and 5 are detail views of the skate runner holder with a skate runner thereon showing the different positions of the runner before and while the grinding wheel is engaged therewith.

The skate runner holder 1 is provided with the end journals 2 by means of which it is supported in the frame 3, and is tilted thereon so as to properly locate the face of the runner 4 with respect to the grinding wheel 5 carried by its arbor 6. This holder is retained in any of its tilted positions by means of the adjusting screws 7 and 8 carried by the arm 9 of said holder. The frame 3 is mounted on the plate 10 and is longitudinally adjusted thereon and held in any of its adjusted positions by means of the screws 11.

The plate 10 rests on the longitudinally reciprocating carriage 12 mounted on the support 13, and this support rests on the bed 14. The plate 10 is moved toward the grinding wheel by suitable mechanism (not shown) and is returned by means of the spring 15 located between the stop 16 of the carriage 12 and the block 17 of the slide, while the adjusting stop screw 18 limits the return of the slide.

In my former patent above referred to, the curved tread portion of the skate runner rested on a curved seat corresponding to this curved tread, and a vertically operating slide carrying a roll was mounted on the skate runner holder, and this roll engaged with a stationary convex-shaped former to give a vertical movement to the holder during the operation of grinding and cause the grinding wheel to follow the curvature of the runner. This arrangement required considerable mechanism which added greatly to the cost of the machine.

In my resent construction, I dispense with the former, slide and roll and other mechanism connected therewith. Referring to Fig. 3, the ledge 1 is made straight instead of concave as in the patent above referred to; and the tread 4' of the runner rests naturally thereon as shown. \Vhen, therefore, the carriage moves in the direction of arrow Z) (Fig. 1) to grind, the instant the toe 4 of the runner comes in con tact with the grinding wheel, it will be forced down as shown at Fig. 4. This will cause the runner to rock or roll on its curved tread until the heel 4 is brought against the pin 19 projecting from the vertical face of the holder 1, and when the center of the runner has passed the grinding wheel, the runner will rock to bring the tread of the heel portion against the ledge 1 as shown at Fig. 5. By this arrangement of allowing the convex tread of the runner to rock on a straight surface while the grinding wheel is in contact therewith and while under the influence of said wheel,-the wheel will follow the curvature of the runner and produce the same effect as when the slide, roll and former are used as previously described.

The end-pieces 20 and 21 are adjustably mounted on the holder for different lengths of runners and are secured thereto by the screws 22 and 23. The piece 21 serves as a kicking post for the heel of the runner during the grinding operation.

24 and 25 are spring fingers adapted to engage with the outer surface of the runner and hold it in vertical position when the wheel is not engaged therewith, as follows: lVhen the carriage is ready to move forward, the finger 24 is against the runner, as shown at Fig. 1, and when the carriage has traveled far enough, the finger 25 will be brought against the outer face of the runner to hold said runner in place when the finger 24 and wheel 5 are out of contact therewith. In other Words, when the carriage has traveled far enough in the direction of arrow Z) to clear the heel of the runner from the grinding wheel, and on the return of the carriage,

the fingers will be in the position shown at Fig. 1, and when in this position, the finger 24 is swung away from the finished runner Patented Nov. 23, 1909.

and a rough or ungrooved one is inserted as follows: The finger 24 is secured to the head 26 (Fig. 2), having the handle 27. This head is rotatably mounted 011 the pin 28, which pin is vertically adjustable in the block 29, and this latter is horizontally adjustable on the pin 30 projecting from and secured to the carriage support 13. The spring 31 being connected to tail 24 of the finger 2% and the lug 32 on the top of the head 33 of the pin 28, will keep the finger 24 under spring tension while against the skate runner. The finger 25 is secured to the stud 34 (Fig. 1) and such stud is connected with some stationary part of the machine.

The mechanism necessary to throw the plate 10 around toward the grinding wheel is not shown, as it forms no part of my pres ent invention. It will, therefore, be understood that any well known mechanism can be employed for this purpose. This also applies to the mechanism for reciprocating the carriage 12.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a machine for grinding the sides of skate runners, a reciprocating carriage, a skate runner holder mounted thereon and having a bearing surface on which the runner is adapted to rock under the influence of the grinding wheel, so that said wheel will follow the curvatureof the runner during the grinding operation, for the purpose set forth.

2. In a machine for grinding the sides of skate runners, a reciprocating carriage, a skate runner holder mounted thereon and having a straight bearing surface adapted to support the convex tread of the runner and on which surface the runner is adapted to rock under the influence of the'grinding wheel, so that the said wheel will follow the curvature of the runner, a stop to limit the upward roll or movement of the runner while its opposite end is engaged by the wheel, a kicking post for the runner, for the purpose set forth.

3. In a machine for grinding the sides of skate runners having a longitudinally operating carriage, a skate runner holder thereon, said holder having a bearing surface for the convex tread of the runner and on which surface the runner is adapted to rock under the influence of the grinding wheel, so that said wheel will follow the curvature of the runner, a stop to limit the upward roll or movement of the runner while the wheel is engaged with its opposite end, adjustable end-pieces for the runner, one of which endpieces serves as a kicking post for the runner, spring fingers adapted to contact with the side of the runner, for the purpose set forth.

Signed at New Haven in the county of New Haven and State of Connecticut this 28th day of March A. D. 1908.

CHARLES L. JOY. lVitnesses GEORGE A. TYLER, CAROLINE STREIT. 

